#include <stdio.h>
#include <stdio.h>
#include <string.h>

struct A {
    int num;
    int [0];
}
int main()
{
    struct A *a = NULL;
    a = malloc(sizeof(*a) + sizeof(int) * 5);
    a.num = 10;
    printf("%d \n ", a.num);
    return 0;
}
